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http://dx.doi.org/10.5103/KJSB.2013.23.3.279

Effect of Head Posture and Breathing Pattern on Muscle Activities of Sternocleidomastoid and Scalene during Inspiratory Respiration  

Koh, Eun-Kyung (Department of Physical Therapy, Masan University)
Jung, Do-Young (Department of Physical Therapy, College of Tourism & Health Science, Joongbu University)
Publication Information
Korean Journal of Applied Biomechanics / v.23, no.3, 2013 , pp. 279-284 More about this Journal
Abstract
The purpose of this study was to determine the effect of head posture and respiratory pattern on muscle activities of sternocleidomastoid (SCM) and scalene during maximal respiration. The seventeen subjects with upper-costal breathing pattern were participated in this study. Surface electromyography was used to measure the muscles activities of SCM and scalene. The volume and velocity of inspiration were monitored by using the spirometer in each subject. Each subject was performed the 3-cycle of respiration in each condition. The mean values of three peak muscle activity in each muscle were used in the data analysis. A2 (head posture: forward head posture: FHP vs. neutral posture) X 2 (breathing pattern: costal vs. diaphragmatic) repeated-measures analysis of variance (ANOVA) was used to compare the normalized muscle activities of the SCM and scalene. The results showed that the muscle activities of SCM and scalene in diaphragmatic breathing were significantly lower than those in costal breathing for each head posture (p<.0125). The muscle activities of SCM in neutral position were lower than those in forward head position during costal breathing (p<.0125). The diaphragmatic breathing in neutral position of head is recommended to decrease the tension of the accessory inspiratory muscles during respiration in neck-pain patients with FHP.
Keywords
Accessory Inspiratory Muscles; Breathing Patterns; Forward Head Posture;
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